Savant syndrome—sometimes abbreviated as savantism—is not a recognized medical diagnosis, but researcher Darold Treffert defines it as a rare condition in which persons with developmental disorders (including autism spectrum disorders) have one or more areas of expertise, ability or brilliance that are in contrast with the individual's overall limitations.

Individuals with the syndrome are often simply called savants. This can be a source of confusion since savant can also mean a person of learning, especially one of great knowledge in a particular subject.

My dear Walt Whitman wrote this beauty : Savantism

THITHER, as I look, I see each result and glory retracing itself and nestling close, always obligated;